Abstract: The modeling of comminution with high-pressure grinding rolls (HPGR) has been carried out based on flowsheet investigation data obtained from HPGR-comminution circuit at the iron-ore processing plant of Washan.Using this comminution model together with the classification model represented by a partitioning curve, a simulation study has been done for the closed-circuit operations of the HPGR with 3 mm screening.The result shows the effectiveness and the practicability of this modeling approach for the HPGR-comminution.

Key words: Mineral processing, High-pressure grinding rolls, Mathematical modeling, Computer simulation, Flowsheet investigation